[flang-commits] [mlir] [flang] [mlir][IR] Add rewriter API for moving operations (PR #78988)

[Mehdi Amini via flang-commits]

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@@ -366,3 +366,31 @@ void RewriterBase::cloneRegionBefore(Region &region, Region &parent,
 void RewriterBase::cloneRegionBefore(Region &region, Block *before) {
   cloneRegionBefore(region, *before->getParent(), before->getIterator());
 }
+
+void RewriterBase::moveOpBefore(Operation *op, Operation *existingOp) {
+  moveOpBefore(op, existingOp->getBlock(), existingOp->getIterator());
+}
+
+void RewriterBase::moveOpBefore(Operation *op, Block *block,
+                                Block::iterator iterator) {
+  Block *currentBlock = op->getBlock();
+  Block::iterator currentIterator = op->getIterator();
+  op->moveBefore(block, iterator);
+  if (listener)
+    listener->notifyOperationInserted(
+        op, /*previous=*/InsertPoint(currentBlock, currentIterator));
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joker-eph wrote:

It's not clear to me that this is enough to implement a "moveOpBefore" safely.

See: https://discourse.llvm.org/t/what-is-the-extent-of-the-changes-that-can-be-done-in-a-patternrewriter/76343/2

https://github.com/llvm/llvm-project/pull/78988